One thing I've always loved about Halo is the sheer amount of dialogue issued by the soldiers you fight alongside. Reach is no different, especially with the wide range of voice actors it has to offer. Anything good or funny you've heard? General comments concerning the writing or voice acting in Reach? Might as well post it here.
"You ever wonder what's up there? I mean, besides the genocidal aliens." - Soldier on Long Night of Solace

I have to say my favorite line in the game has to be "Good luck to you Spartan." There's just something about the look on Keyes' face, the delivery of the line, and the deeper understanding. It really is the pivotal moment for Noble 6, in my eyes. He/she could have potentially gone with the Chief and been fighting alongside him for the whole of the Halo series, but instead decides to remain with his/her fallen comrades, to protect the Autumn and ensure that one ship makes it off planet, and make his/her final stand for Reach and for them, even knowing that it will fall. The whole depth of Noble 6's tragedy almost seems to be summed up in that one line, coupled with the look of understanding on Keyes' face. The line is essentially: "Good luck, even though we both know it won't matter. But thank you."

All joking aside, I'm a pretty big fan of Jun's "Gonna steal it back," line. I thought it was about as perfect as you're going to get with Halo dialogue.
I honestly haven't payed as much attention to it as I probably should, especially when IWHBYD is on (what was the reasoning behind making skulls available from the start, again?). I'll make a point of it next time I run through campaign.

Some of the dialogue with IWHBYD is pretty good, but the real gems come with the firefight voices. I got Stacker's voice cause it was the cheapest and he has some good lines. Headshot: "Oooh, I can see through that!"

Some of the dialogue with IWHBYD is pretty good, but the real gems come with the firefight voices. I got Stacker's voice cause it was the cheapest and he has some good lines. Headshot: "Oooh, I can see through that!"

If you have some spare credits lying around, I would strongly recommend picking up a Firefight voice. All Six's voice (the default one) ever does is grunt or chuckle - buying Emile's voice yesterday has increased my enjoyment of the Firefight soundscape considerably.

I just wish somebody would post five-minute gameplay videos of all the different voices. I have a pretty good idea of what Buck's sounds like because everyone uses it, but other than that I'm clueless, and I'd rather not shit out a bunch of credits for something that I don't end up using.

Personally I'm fond of Auntie Dot. Fortunately, their original idea for her voice failed, and instead of sounding like you are Auntie Dot, it now sounds like you have an AI in your armor commenting on your fight. Unfortunately, this led me to believe that Cortana would be the same way, and I made the mistake of wasting a bunch of credits on her. I don't recommend anyone else doing that. Unless your Spartan character is female...

Personally I'm fond of Auntie Dot. Fortunately, their original idea for her voice failed, and instead of sounding like you are Auntie Dot, it now sounds like you have an AI in your armor commenting on your fight. Unfortunately, this led me to believe that Cortana would be the same way, and I made the mistake of wasting a bunch of credits on her. I don't recommend anyone else doing that. Unless your Spartan character is female...